Some elements and their valencies are given
Write the chemical formula of zinc oxide
.

Some elements and their valencies are given Write the chemical formula of barium chloride .

Some elements and their valencies are given The chemical formula of calcium oxide is CaO . What is the valency of calcium? .

write the chemical formula of oleum?

The chemical formula of Plaster of Paris is

The valency of iron (Fe) is 3 and oxygen (0) is 2. Write the chemical formula of iron oxide

The atomic number of four elements are given below. Write the chemical formula of the compound formed by two elements other than inert gases.